Kenneth Grant Dayley
- Bats Left, Throws Left
- Height 6' 0", Weight 175 lb.
- School University of Portland
- High School The Dalles High School
- Debut May 13, 1982
- Final Game April 14, 1993
- Born February 25, 1959 in Jerome, ID USA
Ken Dayley's ERA improved greatly after the 1988 All-Star break. Before the break, it was 3.55. After the break, it was 2.10.